Building SvelteKit forms with Superforms
- In this article, we will explore how to use Superforms, a SvelteKit library, to build forms that provide consistent error messages, handle data effectively, and offer a good user experience.
- Superforms seamlessly validates data on both the server and client using Zod, allowing for easy integration.
- The library supports nested data structures, snapshots, and multiple forms on a single page.
- To install Superforms, use the appropriate command, depending on whether you are adding it to an existing project or creating a new SvelteKit project.
- Server-side validation can be done by creating a schema with Zod and initializing the form using Superforms' server API.
- To post form data back to the server, you can use the form action object or the parameter object, which include information about the form and the data.
- The form action object provides useful properties like the form validation status, whether the data was sent successfully, the posted data, validation errors, and status messages.
- You can customize the form validation by adding logic to handle errors and display appropriate messages to the user.
- The "enhance" feature in Superforms enhances client-side interactivity in forms, bringing real-time validation to the client.
- Client-side validation can be achieved using either a Zod schema or a Superforms validation object, ensuring thorough validation directly on the client side.